BIOL 322 Exam 3 Questions and 100% Correct Answers

What kind of selection pressure is most likely to favor sexual reproduction? Rapidly changing environments, especially ones that fluctuate or co-evolve R. A. Fisher (1930) and H. Muller (1932), proposed that sex accelerates adaptive evolution. Which of the following statements is not true for this Fisher-Muller model? In an asexual population, there are some alternative ways to combine one beneficial mutation in one individual with another beneficial mutation from another individual. Which of the following is a phylogenetic method that can distinguish between asexual and sexual lineages of eukaryotic organisms? Analysis of nDNA- and mtDNA- based trees Which of the following statements is not true regarding asexual reproduction in animals? Asexual taxa are longer lived Competition between members of one sex for mating access to the other sex is often asymmetrical. This is, in part, due to the fundamental difference between the sexes in terms of the relative investment in reproduction. Which of the following are the expectations for how sexual selection should operate? If males and females invest equally and both invest a lot, then both should be choosy. Female swordtail fish are known to prefer males with long swords as mates. in closely related platyfish, males lack a sword, and some phylogenetic reconstructions suggest that the ancestor to both species of fish did not have a swordtail. In controlled experiments with platyfish females, they too preferred the males with artificially elongated tail fins. Such mate choice might be an example of the ____ model. Pre-existing sensory bias In drosophila, males usually perform a characteristic courtship dance in order to attract females and females will make a choice between the males. What type of sexual selection is responsible for this behavior in fruit flies? Intersexual selection In red deer, males whose lifetime reproductive success is relatively high tend to produce daughters whose lifetime reproductive success is relatively low. Choose the best statement that explains such findings. The sexual conflict produces an antagonistic relationship between traits that confer high male reproductive success and high female reproductive success.